Phosphorus, or as the poets call him Eosphorus (Ἑωσφόρος) or Phaesphorus (Φαεσφόρος) (Latin Lucifer), that is, the bringer of light or of Eos, is the name of the planet Venus, when seen in the morning before sunrise.1 The same planet was called Hesperus (Vesperugo, Vesper, Noctifer or Nocturnus) when it appeared in the heavens after sunset.2

Phosphorus as a personification is called a son of Astraeus and Eos,3 of Cephalus and Eos,4 or of Atlas.5 By Philonis he is said to have been the father of Ceyx,6 and he is also called the father of Daedalion,7 of the Hesperides,8 or of Hesperis, who became by her brother Atlas the mother of the Hesperides.9